In-orbit performance of the Herschel/SPIRE imaging Fourier transform spectrometer: lessons learned

Naylor, David; Baluteau, Jean-Paul; Bendo, G. J.; Benielli, D.; Fulton, T.; Gom, Brad; Griffin, M. J.; Hopwood, R.; Imhof, P.; Lim, T.; Lu, N.; Makiwa, G.; Marchili, N.; Orton, Glenn S.; Παπαγεωργίου, Ανδρέας; Pearson, Chris; Polehampton, E. T.; Schulz, B.; Spencer, L. D.; Swinyard, Bruce; Valtchanov, I.; Wiel, M. H. D. van der; Veenendaal, Ian; Wu, R.

doi:10.1117/12.2054989

Cited by 4 publications

(6 citation statements)

References 29 publications

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“…2. The spectra were fitted using sinc instrumental line shape (Naylor et al 2014). A systematic velocity of 270 km s −1 for the LMC (Marshall et al 2004) was adopted.…”

Section: Observations and Data Reductionmentioning

confidence: 99%

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The mass-loss rates of red supergiants at low metallicity: detection of rotational CO emission from two red supergiants in the Large Magellanic Cloud

Matsuura

Sargent

Swinyard

et al. 2016

Mon. Not. R. Astron. Soc.

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Using the PACS and SPIRE spectrometers on-board the Herschel Space Observatory, we obtained spectra of two red supergiants (RSGs) in the Large Magellanic Cloud (LMC). Multiple rotational CO emission lines (J=6-5 to 15-14) and 15 H 2 O lines were detected from IRAS 05280−6910, and one CO line was detected from WOH G64. This is the first time CO rotational lines have been detected from evolved stars in the LMC. Their CO line intensities are as strong as those of the Galactic RSG, VY CMa. Modelling the CO lines and the spectral energy distribution results in an estimated mass-loss rate for IRAS 05280−6910 of 3 × 10 −4 M yr −1 . The model assumes a gas-to-dust ratio and a CO-to-H 2 abundance ratio is estimated from the Galactic values scaled by the LMC metallicity ([Fe/H]∼ −0.3), i.e., that the CO-to-dust ratio is constant for Galactic and LMC metallicities within the uncertainties of the model. The key factor determining the CO line intensities and the mass-loss rate found to be the stellar luminosity.

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“…2. The spectra were fitted using sinc instrumental line shape (Naylor et al 2014). A systematic velocity of 270 km s −1 for the LMC (Marshall et al 2004) was adopted.…”

Section: Observations and Data Reductionmentioning

confidence: 99%

“…The SPIRE FTS unapodized spectra of the CO lines (continuous lines) of IRAS 05280-6910, with instrumental model line profiles (red dotted lines;Naylor et al 2014).…”

mentioning

confidence: 99%

The mass-loss rates of red supergiants at low metallicity: detection of rotational CO emission from two red supergiants in the Large Magellanic Cloud

Matsuura

Sargent

Swinyard

et al. 2016

Mon. Not. R. Astron. Soc.

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“…After rinsing with water and drying, the PMMA was developed in a solution of methyl isobutyl ketone solvent (MIBK) and IPA in the ratio 1:3 for 60 sec at room temperature (4). This was followed by a blanket deposition of 5 nm Cr/ 45 nm Au using an e-beam evaporator (5). The final step was the removal of resist and lifting off of the metal stack in the non-patterned areas (6).…”

Section: Fabricationmentioning

confidence: 99%

“…3,4 They have been used as intensity beamsplitters on the SPIRE instrument of the Herschel observatory. 5 Frequency selective surfaces (FSS) such as slots in metal sheets have been used to get transmission between 20-60 µm for planetary spectroscopy. 6 Restrahlen crystal filters were used as a dichroic beam-splitters for the short wavelength spectrometer (SWS) on Infrared Space Observatory (ISO).…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of a NIR-FIR dichroic for the infrared interferometer BETTII

Dhabal

Rinehart

Silverberg

et al. 2018

Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX

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BETTII is a balloon-borne far infra-red (FIR: 30-100 µm) interferometer that also uses a near-infrared (NIR: 1-2.5 µm) channel for fine pointing sensing using stars. We have developed an inductive grid dichroic to divide the incoming beam into two components, by reflecting FIR light and transmitting NIR light. The dichroic is fabricated using focused electron beam technology to produce a 1 µm period, 100 nm width metal grid on a sapphire substrate in order to have high reflectance for FIR wavelengths. Here we discuss the design and the detailed manufacturing process for such a dichroic. The transmission and reflectance characteristics are also presented. We discuss them in context of the BETTII requirements.

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“…PACS, using stellar models, and SPIRE, using Uranus and Neptune, is better than 20 %. Evaluation of the data as well as update and improvement of the theoretical models is ongoing Naylor et al 2014;Müller et al 2014). 54…”

Section: Visible and Near- Mid- And Far-infrared Instrumentsmentioning

confidence: 99%

Spectroradiometry with space telescopes

Pauluhn

Huber

Smith

et al. 2015

Astron Astrophys Rev

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Radiometry, i.e. measuring the power of electromagnetic radiationhitherto often referred to as "photometry"-is of fundamental importance in astronomy. We provide an overview of how to achieve a valid laboratory calibration of space telescopes and discuss ways to reliably extend this calibration to the spectroscopic telescope's performance in space. A lot of effort has been, and still is going into radiometric "calibration" of telescopes once they are in space; these methods use celestial primary and transfer standards and are based in part on stellar models. The history of the calibration of the Hubble Space Telescope serves as a platform to review these methods. However, we insist that a true calibration of spectroscopic space telescopes must directly be based on and traceable to laboratory standards, and thus be independent of the observations. This has recently become a well-supported aim, following the discovery of the acceleration of the cosmic expansion by use of type-Ia supernovae, and has led to plans for launching calibration rockets for the visible and infrared spectral range. This is timely, too, because an adequate exploitation of data from present space missions, such as Gaia, and from many current astronomical projects like Euclid and WFIRST demands higher radiometric accuracy than is generally available today. A survey of the calibration of instruments observing from the X-ray to the infrared spectral domains that include instrument-or mission-specific estimates of radiometric accuracies rounds off this review.

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In-orbit performance of the Herschel/SPIRE imaging Fourier transform spectrometer: lessons learned

Cited by 4 publications

References 29 publications

The mass-loss rates of red supergiants at low metallicity: detection of rotational CO emission from two red supergiants in the Large Magellanic Cloud

The mass-loss rates of red supergiants at low metallicity: detection of rotational CO emission from two red supergiants in the Large Magellanic Cloud

Fabrication and characterization of a NIR-FIR dichroic for the infrared interferometer BETTII

Spectroradiometry with space telescopes

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